/**
* @brief Select a random truetype font from the directory specified in magma.http.fonts.
* @return NULL on failure, or a managed string containing the pathname of the randomly selected font file on success.
*/
stringer_t * register_captcha_random_font(void) {
DIR *directory;
stringer_t *path;
struct dirent64 *dp;
size_t count = 0, selection;
// Open the current working directory.
if (!(directory = opendir(magma.http.fonts))) {
log_pedantic("Unable to open the font directory. { directory = %s }", magma.http.fonts);
return NULL;
}
// Count the number of fonts.
while ((dp = readdir64(directory))) {
if (!st_cmp_ci_ends(NULLER(dp->d_name), PLACER(".ttf", 4))) {
count++;
}
};
// No fonts were found.
if (!count) {
log_pedantic("The web fonts directory is empty. { directory = %s }", magma.http.fonts);
closedir(directory);
return NULL;
}
// Pick a random font.
selection = (rand_get_uint32() % count) + 1;
// Reset the directory stream.
rewinddir(directory);
// Do the loop again.
while (selection && (dp = readdir64(directory))) {
if (!st_cmp_ci_ends(NULLER(dp->d_name), PLACER(".ttf", 4))) {
selection--;
}
}
// Build the path.
if (selection || !dp || !(path = st_aprint("%s/%s", magma.http.fonts, dp->d_name))) {
log_pedantic("Could not build the font file path.");
closedir(directory);
return NULL;
}
closedir(directory);
return path;
}
/**
* @brief Increment the serial number for an object in memcached.
* @param type the serial type to be queried (OBJECT_USER, OBJECT_CONFIG, OBJECT_FOLDERS, OBJECT_MESSAGES, or OBJECT_CONTACTS).
* @param num the specific object identifier.
* @return 0 on failure or the new serial number of the requested object.
*/
uint64_t serial_increment(uint64_t type, uint64_t num) {
uint64_t result = 0;
stringer_t *key, *prefix;
// Build retrieval key.
if (!(prefix = serial_prefix(type)) || !(key = st_aprint("magma.%.*s.%lu", st_length_int(prefix), st_char_get(prefix), num))) {
log_pedantic("Unable to build %.*s serial key.", st_length_int(prefix), st_char_get(prefix));
return 0;
}
// Increment the key.
result = cache_increment(key, 1, 1, 2592000);
st_free(key);
return result;
}
/**
* @brief Get the serial number (checkpoint value) for an object from memcached.
* @param type the serial type to be queried (OBJECT_USER, OBJECT_CONFIG, OBJECT_FOLDERS, OBJECT_MESSAGES, or OBJECT_CONTACTS).
* @param num the specific object identifier.
* @return 0 on failure or the serial number of the requested object.
*/
uint64_t serial_get(uint64_t type, uint64_t num) {
uint64_t result = 0;
stringer_t *key, *prefix;
// Build retrieval key.
// QUESTION: This is used a few times and definitely should be its own function.
if (!(prefix = serial_prefix(type)) || !(key = st_aprint("magma.%.*s.%lu", st_length_int(prefix), st_char_get(prefix), num))) {
log_pedantic("Unable to build %.*s serial key.", st_length_int(prefix), st_char_get(prefix));
return 0;
}
// Get the key value. The increment functions store the value in binary form, so we must use them to access the value, even if we aren't incrementing the value.
result = cache_increment(key, 0, 0, 2592000);
st_free(key);
return result;
}
/**
* @brief Reset the serial number to 1 for an object in memcached.
* @param type the serial type to be queried (OBJECT_USER, OBJECT_CONFIG, OBJECT_FOLDERS, OBJECT_MESSAGES, or OBJECT_CONTACTS).
* @param num the specific object identifier.
* @return 0 on failure or the new value of the cached serial number (1) on success.
*/
uint64_t serial_reset(uint64_t type, uint64_t num) {
uint64_t result = 0;
stringer_t *key, *prefix;
// Build key.
if (!(prefix = serial_prefix(type)) || !(key = st_aprint("magma.%.*s.%lu", st_length_int(prefix), st_char_get(prefix), num))) {
log_pedantic("Unable to build %.*s serial key.", st_length_int(prefix), st_char_get(prefix));
return 0;
}
// If were able to set the key, return the value one.
if (cache_set(key, CONSTANT("1"), 2592000) == 1) {
result = 1;
}
st_free(key);
return result;
}